World Bulletin / News Desk
TUPRAS, which operates four refineries in Turkey, had production-based sales worth 32.59 billion Turkish liras ($9.3 billion) according to ISO survey data for 2016.
ISO chair, Erdal Bahcivan, revealed Turkey's 500 biggest industrial enterprises at a news conference on Monday.
International car manufacturer Ford was in second place with production-based sales of 16.31 billion Turkish liras ($4.6 billion) followed by Turkish automotive firm Tofas which came third with 12.85 billion Turkish liras ($3.6 billion).
Istanbul Chamber of Industry has been announcing data on Turkey’s top 500 companies since 1968.